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TLV320AIC3100: How to interface headphone mic signal from tlv320aic to processor

AMB
Prodigy 70 points
Part Number: TLV320AIC3100

Dear Team,

With the IMX8M-Mini processor I want to interface TLV320AIC3100 for headphone along with the Mic.

And I want to take Mic signal input to the tlv IC, process it and send the signal to the processor. But I could not able to get  the hardware connections and which registers need to set for this.

 Could you please support to achieve it

  • 0
    TI__Mastermind 29745 points

    Hi,

    In the datasheet section 1.4, there's a functional block diagram that has the respective registers for example, I have highlighted two of them below.

    So, depending on the path you want to set, you can write the registers accordingly.

    Regards.

  • 0 in reply to pdjuandi
    Prodigy 70 points

    Hi, Thank you 

    Can you also let me know how to select on board mic and headset mic. As I want to select only one at a time.

  • 0 in reply to AMB
    TI__Mastermind 29745 points

    The EVM comes with MIC J2 connector only as shown below. The Headphone J4 is a jack for headphone output without MIC input. 

    I

    So, you will just need to configure the MIC input.

    Regards,

  • 0 in reply to pdjuandi
    Prodigy 70 points

    Yes sure. But on our board we do take the onboard mic and now we are implementing headset mic also providing input signal to pin14.

    I need solution for selection of on board mic and headset mic. Can you support on this.

    Also can you please guide me on what to write in dts file

  • 0 in reply to AMB
    TI__Mastermind 29745 points

    You have to use different input for Mic and headset Mic in the codec or externally provide a way to switch to either Mic whenever you want to use it.

    From device point of view, it's just the register to set/clear, it will not be able to detect its input from mic or headset mic since they are coming from the same pin. So, you will need to assign a different input for mic and headset mic if you have both mic in the system or if only one mic active or plug in at a time then you can use the same input. 

    On dts, you might want to consult the IMX8M-Mini processor team. The Linux driver is in the product site below.

    TLV320AIC3100 data sheet, product information and support | TI.com

    Regards.